EP1313111A1 - Transformator - Google Patents

Transformator Download PDF

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Publication number
EP1313111A1
EP1313111A1 EP01309737A EP01309737A EP1313111A1 EP 1313111 A1 EP1313111 A1 EP 1313111A1 EP 01309737 A EP01309737 A EP 01309737A EP 01309737 A EP01309737 A EP 01309737A EP 1313111 A1 EP1313111 A1 EP 1313111A1
Authority
EP
European Patent Office
Prior art keywords
transformer
electrical
enclosure
winding
windings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01309737A
Other languages
English (en)
French (fr)
Inventor
Jens Frank Unit 4212-4224 Markwardt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Friwo Far East Ltd
Original Assignee
Friwo Far East Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Friwo Far East Ltd filed Critical Friwo Far East Ltd
Priority to EP01309737A priority Critical patent/EP1313111A1/de
Priority to CNU022047093U priority patent/CN2621331Y/zh
Priority to US10/058,853 priority patent/US20030095023A1/en
Priority to US10/294,907 priority patent/US20030095024A1/en
Priority to EP02257972A priority patent/EP1313113A2/de
Publication of EP1313111A1 publication Critical patent/EP1313111A1/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means

Definitions

  • the invention relates to transformers, and in particular to low voltage transformers used in battery charges for rechargeable consumer products.
  • the transformer comprises an iron core carrying first and second transformer windings.
  • the transformer is housed within an enclosure. Projecting from the outer surface of the enclosure are electrical pins adapted to engage an electrical wall outlet. The pins are in electrical connection with the first winding for energising the transformer.
  • the second winding is connected to a rectifier and output cord.
  • the enclosure In order to comply with electrical safety standards the enclosure must be made from fire retardant material.
  • the choice of material depends on the operating temperature and normal fault operating temperature of the transformer according to various international safety standards such as UL1950 or EN60950. Fire retardant material is more expensive then normal plastics material and this adds to the cost of the enclosure.
  • a transformer including:
  • the second enclosure is made of fire retardant material.
  • the transformer includes an electrical pin assembly in removable communication with the first and second electrical connectors, said pin assembly disposed to project from the outer surface of the enclosure to facilitate connection of the transformer with an electrical wall outlet.
  • the transformer may included a winding bobbin that forms part of the second enclosure.
  • a battery charger including:
  • At least the first winding is formed on a bobbin that forms part of the second enclosure.
  • Figures 1 and 2 are perspective views of a battery charger that, externally, is substantially identical to those of known type.
  • An enclosure 1 houses a transformer and rectifier. Electrical pins 2 and 3 project from one side of the enclosure 1 and are in electrical connection with the transformer. The pins 2 and 3 are adapted to plug into an electrical wall outlet (not shown) to energise the transformer. An electrical output cord (not shown) emerges from an aperture (shown with cord protector 4) in the enclosure 1.
  • the enclosure 1 is separable at an equator 5 into two enclosure halves 1a and 1b.
  • a transformer comprising an iron core 6 carrying a winding bobbin 19 with a first, or primary, winding 7 and second, or secondary, winding 8 wound thereon.
  • the secondary winding 8 is in electrical connection with a rectifier 9 for providing a low voltage DC output from the battery charger.
  • the tails (not shown) of the primary winding 7 are connected to electrical connectors 10 and 11 respectively.
  • the electrical connectors 10 and 11 are supported in a housing 12 at one end of bobbin 19.
  • a cartridge 13 bears the two electrical pins 2 and 3.
  • the cartridge 13 is disposed in juxtaposition one enclosure half 1b so that pins 2 and 3 extend through apertures 14 and 15 therein.
  • the pins 2 and 3 in Figures 1 to 4 are of a "European" type configuration.
  • One uniqueness of the current invention is the provision of a second enclosure or cover 16 that encloses the electrical connectors 10 and 11 and at least the tail portions of transformer primary winding 7.
  • the cover 16 has two apertures 17 and 18 therein to facilitate access to electrical connectors 10 and 11 by lower ends of pins 2 and 3.
  • Apertures 17 and 18 have shrouds so that the connection between lower ends of pins 2 and 3 and connectors 10 and 11 are enclosed by the cover 16.
  • the cover 16 is made from fire retardant material and encloses the primary windings ("high voltage") connection parts of the transformer in a fire retardant housing as require by the appropriate safety standards.
  • the advantage of the invention is that it allows the outer enclosure 1 to be made to a lower fire retardant standard.
  • the cover 16 provides the necessary protection. This reduces costs as a lower quantity of fire retardant material is required for the cover 16 while still providing a satisfactory level of safety for the transformer.
  • PBT Polybutylene Terephthalate
  • Figures 5 and 6 show a substantially identical arrangement using United Kingdom standard electrical pins 2 and 3.
  • Figures 7 and 8 show yet a further substantially identical arrangement using United States standard electrical pins 2 and 3.
  • connectors 10 and 11 are omitted and the electrical pins 2 and 3 are in direct electrical communication with the tails of the primary winding 7. This is the arrangement of the embodiment shown in Figures 7 and 8.
  • the shrouds of apertures 17 and 18 in cover 16 enclose the electrical connection between pins 2 and 3 of primary winding 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
EP01309737A 2001-11-19 2001-11-19 Transformator Withdrawn EP1313111A1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP01309737A EP1313111A1 (de) 2001-11-19 2001-11-19 Transformator
CNU022047093U CN2621331Y (zh) 2001-11-19 2002-01-22 变压器以及带有这种变压器的电池充电器
US10/058,853 US20030095023A1 (en) 2001-11-19 2002-01-28 Transformer
US10/294,907 US20030095024A1 (en) 2001-11-19 2002-11-15 Transformer
EP02257972A EP1313113A2 (de) 2001-11-19 2002-11-19 Transformator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01309737A EP1313111A1 (de) 2001-11-19 2001-11-19 Transformator

Publications (1)

Publication Number Publication Date
EP1313111A1 true EP1313111A1 (de) 2003-05-21

Family

ID=8182474

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01309737A Withdrawn EP1313111A1 (de) 2001-11-19 2001-11-19 Transformator

Country Status (3)

Country Link
US (2) US20030095023A1 (de)
EP (1) EP1313111A1 (de)
CN (1) CN2621331Y (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1657791A1 (de) * 2004-11-16 2006-05-17 Friwo Mobile Power GmbH Steckernetzteil

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090273425A1 (en) * 2008-04-25 2009-11-05 Tremaine John M Power supply center
KR100978503B1 (ko) * 2010-04-23 2010-08-31 주식회사 시스하이텍 슬림형 고전압 트랜스포머
US9356440B2 (en) * 2014-01-24 2016-05-31 Tower Manufacturing Corp. Leakage current detection and interruption (LCDI) device with ignition containment features
CN110301019B (zh) * 2017-05-05 2021-07-09 华为技术有限公司 一种变压器及开关电源

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2547649A (en) * 1948-12-08 1951-04-03 Gen Electric Electric induction apparatus
US3711806A (en) 1972-01-03 1973-01-16 Dormeyer Ind Inc Power pack
US4519015A (en) 1983-08-23 1985-05-21 Lin Jiing S Plug-in type of power supply
US4677411A (en) * 1984-04-12 1987-06-30 Brown, Boveri & Cie Ag Explosion-proof or flame-proof plug having a transformer disposed in a compression-resistant chamber
US4843362A (en) * 1987-03-04 1989-06-27 Equipements Automobiles Marchal Ignition coil for internal combustion engine
US4916424A (en) 1988-04-26 1990-04-10 Kijima Co., Ltd. Electric part in the form of windings
US5272459A (en) * 1992-07-20 1993-12-21 Xenotronix Inc. Standardized and self-contained transformer battery charger assembly
DE29609201U1 (de) * 1996-05-23 1996-09-19 Okin Ges Fuer Antriebstechnik Antriebsanordnung für Sitz- oder Schlafmöbel im Wohnbereich
WO2001048552A1 (en) 1999-12-27 2001-07-05 3M Innovative Properties Company Overhead projector having a modular inner enclosure

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2547649A (en) * 1948-12-08 1951-04-03 Gen Electric Electric induction apparatus
US3711806A (en) 1972-01-03 1973-01-16 Dormeyer Ind Inc Power pack
US4519015A (en) 1983-08-23 1985-05-21 Lin Jiing S Plug-in type of power supply
US4677411A (en) * 1984-04-12 1987-06-30 Brown, Boveri & Cie Ag Explosion-proof or flame-proof plug having a transformer disposed in a compression-resistant chamber
US4843362A (en) * 1987-03-04 1989-06-27 Equipements Automobiles Marchal Ignition coil for internal combustion engine
US4916424A (en) 1988-04-26 1990-04-10 Kijima Co., Ltd. Electric part in the form of windings
US5272459A (en) * 1992-07-20 1993-12-21 Xenotronix Inc. Standardized and self-contained transformer battery charger assembly
DE29609201U1 (de) * 1996-05-23 1996-09-19 Okin Ges Fuer Antriebstechnik Antriebsanordnung für Sitz- oder Schlafmöbel im Wohnbereich
WO2001048552A1 (en) 1999-12-27 2001-07-05 3M Innovative Properties Company Overhead projector having a modular inner enclosure

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"INTERNATIONAL STANDARDS IEC 60065", 1998, IEC, GENEVA, SWITZERLAND, pages: 1 - 4, XP002970917
"INTERNATIONAL STANDARDS IEC 60950", 1999, IEC, GENEVA, SWITZERLAND, pages: 281, 285, XP002970916

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1657791A1 (de) * 2004-11-16 2006-05-17 Friwo Mobile Power GmbH Steckernetzteil

Also Published As

Publication number Publication date
US20030095023A1 (en) 2003-05-22
US20030095024A1 (en) 2003-05-22
CN2621331Y (zh) 2004-06-23

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